Good find! I'm going to bookmark that site for future reference.
Wait, why do both sides list the same part number (17K709)?
EDIT: I just spent a few minutes learning about Ford's engineering & part numbers. Interesting stuff. 17K709 is just a generic number for this type of part, and is used on other models too.
1995 Mustang GT (5.0), daily driver
1995 GMC C2500 (5.7), alternate daily driver